-er a-a a-b aaa aab aad aae aag aam aan aar ab- aba abb abd abe abg abm abn abr ad- ada adb add ade adg adm adn adr aea aeb aed aee aeg aem aen aer ag- aga agb agd age agg agm agn agr ama amb amd ame amg amm amn amr an- ana anb and ane ang anm ann anr ar- ara arb ard are arg arm arn arr baa bab bad bae bag bam ban bar bba bbb bbd bbe bbg bbm bbn bbr bda bdb bdd bde bdg bdm bdr be- bea beb bed bee beg bem ben ber bga bgb bgd bge bgg bgm bgn bgr bma bmb bmd bme bmg bmm bmn bmr bna bnb bnd bne bng bnn bnr bra brb brd bre brg brm brn brr daa dab dad dae dag dam dan dar dba dbb dbd dbe dbg dbm dbn dbr dda ddb ddd dde ddg ddm ddn ddr de- dea deb ded dee deg dem den der dga dgd dge dgg dgm dgn dgr dma dmb dmd dme dmg dmm dmn dmr dna dnb dnd dne dng dnm dnn dnr dra drb drd dre drg drm drn drr eaa eab ead eae eag eam ean ear eba ebb ebd ebe ebg ebm ebn ebr ed- eda edb edd ede edg edm edn edr eea eeb eed eee eeg eem een eer ega egb egd ege egg egm egn egr em- ema emb emd eme emg emm emn emr en- ena enb end ene eng enm enn enr era erb erd ere erg erm ern err g-d gaa gab gad gae gag gam gan gar gba gbd gbe gbg gbm gbn gbr gda gdb gdd gde gdm gdn gdr ge- gea geb ged gee geg gem gen ger gga ggb ggd ggg ggm ggn ggr gma gmb gmd gme gmg gmm gmn gmr gna gnb gnd gne gnm gnn gnr gra grb grd gre grg grm grn grr m-r maa mab mad mae mag mam man mar mba mbb mbd mbe mbg mbm mbr mda mdb mdd mde mdg mdm mdn mdr mea meb med mee meg mem men mer mga mgb mgd mge mgm mgn mgr mma mmb mmd mme mmg mmm mmn mmr mna mnb mne mng mnm mnn mnr mra mrb mrd mre mrg mrm mrn mrr naa nab nad nae nag nam nan nar nba nbb nbd nbe nbg nbm nbn nbr nda ndb ndd nde ndg ndm ndn ndr ne- nea neb ned nee neg nem nen ner nga ngb ngd nge ngg ngm ngn nma nmb nmd nme nmg nmm nmn nmr nna nnb nne nng nnm nnn nra nrb nrd nre nrg nrm nrn nrr ra- raa rab rad rae rag ram ran rar rba rbb rbd rbe rbg rbm rbn rbr rda rdb rdd rde rdg rdm rdn rdr re- rea reb red ree reg rem ren rer rga rgb rgd rge rgg rgn rgr rma rmb rmd rme rmg rmm rmn rmr rna rnb rnd rng rnm rnn rnr rra rrb rrd rrg rrm rrn rrr